1.ValueError: invalid literal for int() with base 10 

a Is a string , for example ‘108.8’
Error reason ： Direct pair a Conduct int(a) operation , Grammar does not allow
terms of settlement ：int(float(a)) or round(float(a)), That is, first convert the string to floating-point data , Then round

2.TypeError: Cannot cast array data from dtype(‘float64‘) to dtype(‘＜U32‘)....

Error reason ：‘U32’ and ’S32’ All means numpy An array is an array of strings , Not an array of numbers , Therefore, it cannot be directly converted to floating-point array , Be careful ,numpy Array , As long as one item is a string , The types returned by the array are all string arrays .
terms of settlement ： take numpy Convert to floating point array , Reference code ：

mx = mx.astype(float)